The Brewster B-239 in Aces High II
Aces High II Performance Charts
You can take upto 4 US .50's. Two are mounted in the nose with 200rpg, and the other two are wing mounted with 400rpg. For fire power, you are at par with the P-51B, FM2, and the F4F in the 4 gun load out. You can swap out one of the .50's for a .30cal with 600rpg and 400 rpg for the other .50 in the set. Since it takes 4 bullets from a .30 to match a .50 round, it seems kind of pointless though. About all you will do with that is even out the firing times for the .50's, and I prefer to leave the 400 rounds in the wing as a back up if I have to fight when the others are out of ammo.
No external options exist.
Fighting in the Brewster B-239
Fighting against the Brewster B-239